In 2014, the streets of Charleston were flooded on 11 days. It increased to 38 days in 2015, and in 2016, it was 50 days. The city is taking the threat of sea level rise seriously, says Chief Resilience Officer Mark Wilbert. More than $200 million has been spent on infrastructure, Wilbert says, and the city is planning a vulnerability analysis, which is needed because the tides already have risen a foot over the past century. The increased flooding is easy for Cathryn Zommer to observe. When it